Yeah, so many projects born and grow every single day, so you don't really know what they are really like. Everyone should be careful, though some projects really may be trustful. For example, I follow closely SciDex. They are creating a new type of smart contract generator for complex transactions. So that even regular businesses that need legally binding contracts can be on the blockchain. Thats improving the whole blockchain ecosystem, if you ask me.
Safety of a market certainly depends on each individual. Safety in the form of less volatility and chances of not losing big too fast, or safety of trying to be very cautious of scam. All these things though in a way are something that can only be made as a decision by each person.
If you want to be safe with respect to volatility, then you learn, if it is with respect to not bag holding shit coins, then you do a proper research and if it is about the exchange you want to use, then you simply make it more secured and use reputable ones.